package com.sky.controller.user;

import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "用户端查询菜品")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;
    //根据分类id查询菜品
    @GetMapping("/list")
    public Result<List<DishVO>> listWithFlavorByCategoryId(Long categoryId){
        // 构造 Redis 中的 key，规则：dish_分类id
        String key = "dish_" + categoryId;
        // 查询 Redis 中是否存在菜品数据
        List<DishVO> list1 = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (list1 != null && list1.size() > 0) {
            // 如果存在，直接返回，无须查询数据库
             return Result.success(list1);
        }
            List<Dish> list = dishService.list(categoryId);
            List<DishVO> dishVOList=new ArrayList<>();
            list.forEach(dish -> {
                Long id =dish.getId();
                DishVO dishVO=dishService.getByIdWithFlavor(id);
                dishVOList.add(dishVO);
            });
            //如果不存在，查询数据库，将查询到的数据放入redis中
        redisTemplate.opsForValue().set(key,dishVOList);
            return Result.success(dishVOList);
        }
    }

